increasing demands for cement, iron and steel industries for refractories with suitable workability in severeconditions (without any environmental risks), make the refractories’ researches to be an active area. refractories containing spinel has been developed with addition of chromia as a substitute in refractories using magnesite - chromite. in this research, different amounts of cr2o3 were a...

Iran’s Sarcheshmeh copper industries with an annual production of 120,000 tones are the biggest of it’s kind in South Asia. The main method of production is pyrometallurgical matte making in two reverberatory furnaces which use direct–bond magnesite-chromite refractories supplied by German and Austrian companies. Following a recent major overhaul, bricks in contact with slag, matte and furnace ...

The transport of pure gases through a microporous membrane is described. The alumina-based membrane (pores 2.5-4 nm) is suitable for Knudsen diffusion separation . To improve the separation factor, interaction with and mobility on the pore wall of one of the gases of a mixture is necessary. To introduce surface diffusion of oxygen and hydrogen, a y-alumina membrane was impregnated with silver ....

The present work investigates the use of magnesium hydroxide, produced by magnesia hydration, as a fire retardant in polymers. The hydration was carried out in an autoclave, at temperature of 130°C for 1 hour, and the product was further submitted to cominution in a jet mill. The solids were characterized with regard to their chemical composition, particle size distribution, surface area and mo...

Li Zhang 1,*, Wu Zhang 2, Juhua Zhang 3 and Guangqiang Li 3 1 School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China 2 School of Materials Science and Engineering, Shenyang Ligong University, Shenyang 110168, China; [email protected] 3 The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China; zhangj...

Refractory masonry (refractories) is exposed to in-service loads of different types. To rationalise the design and failure analysis, differences under cyclic monotonic loading were studied. For samples silica refractories tested in wedge splitting set-up global parameters crack trajectories assessed. Under loading, higher fracture energy lower brittleness at seen. Cracks modes had similar non-l...